| Nicotine (μg/g) | Nornicotine (μg/g) | Conversion (%) | ||||
| Parameters | Estimate | SD1 | Estimate | SD | Estimate | SD |
| Mean | 6893.20 | ±138.76 | 4878.57 | ±86.78 | 50.91 | ±0.34 |
| a | −6739.84 | ±135.65 | 4506.62 | ±85.99 | 47.98 | ±0.34 |
| d | −2229.98 | ±349.34 | 746.38 | ±282.49 | −0.45 | ±2.12 |
| add | −0.32 | 0.15 | −0.01 | |||
| R2 | 98.11 | 95.60 | 93.25 | |||